/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshAttributeSet.h
Append bone attributes from another set. When appending, the bone attributes in the Other set will only be appended if a bone with the same name does not exist in the current bone name attribute. Hence, the order of the bones in this set is preserved.
true, if append was successful
bool AppendBonesUnique ( const [FDynamicMeshAttributeSet](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshAttributeSet) & Other )